| 摘要 |
PURPOSE:To carry out uniform cooling by diffusing liquid nitrogen equally in order to cool a hollow molded article such as a gasoline tank at the blowing of the liquid nitrogen in the interior of the gasoline tank after molding in a blow molding equipment for manufacture the hollow molded article. CONSTITUTION:By mounting a rotary cylinder 20 to the piston rod 15A of an air cylinder 15 and a blowing nozzle 17 to the rotation rod 20A of the rotary cylinder 20, under the state that the blowing nozzle 17 is projected from a movable mold 7 by extending the air cylinder 15, liquid nitrogen is so constituted as to be blown in the interior of a hollow molded article under the condition that the blowing nozzle 17 is rotated around its axis center line with the rotary cylinder 20. |
